Loans, Allowance for Credit Losses and Credit Quality Finance Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	$ 1,957,578		$ 1,632,765
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,136,651		1,141,583
Financing Receivable, Originated Three Years before Latest Fiscal Year	687,041		1,044,272
Financing Receivable, Originated Four Years before Latest Fiscal Year	739,884		820,215
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,644,534		1,606,888
Financing Receivable, Revolving	1,323,474		1,448,724
Financing Receivable, after Allowance for Credit Loss	1,443,866		1,643,596
Loans and Leases Receivable, Gross	8,938,988	$ 9,392,866	9,359,648
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,080,587		905,009
Financing Receivable, Originated Two Years before Latest Fiscal Year	737,881		588,489
Financing Receivable, Originated Three Years before Latest Fiscal Year	408,602		651,847
Financing Receivable, Originated Four Years before Latest Fiscal Year	525,196		457,139
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	955,720		905,575
Financing Receivable, Revolving	28,984		48,889
Financing Receivable, after Allowance for Credit Loss	514,573		499,245
Loans and Leases Receivable, Gross	4,251,543	4,173,927	4,071,047
Commercial Real Estate [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	29,480		6,423
Financing Receivable, Originated Two Years before Latest Fiscal Year	54,436		4,821
Financing Receivable, Originated Three Years before Latest Fiscal Year	32,476		23,123
Financing Receivable, Originated Four Years before Latest Fiscal Year	18,923		14,159
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	86,135		47,055
Financing Receivable, Revolving	13,614		0
Financing Receivable, after Allowance for Credit Loss	15,416		5,218
Loans and Leases Receivable, Gross	250,480		100,799
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,029,017		895,594
Financing Receivable, Originated Two Years before Latest Fiscal Year	679,780		546,513
Financing Receivable, Originated Three Years before Latest Fiscal Year	373,916		607,633
Financing Receivable, Originated Four Years before Latest Fiscal Year	496,399		438,455
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	862,508		846,195
Financing Receivable, Revolving	15,370		48,889
Financing Receivable, after Allowance for Credit Loss	489,652		490,280
Loans and Leases Receivable, Gross	3,946,642		3,888,413
Commercial Real Estate [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	22,090		2,992
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,665		37,155
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,210		21,091
Financing Receivable, Originated Four Years before Latest Fiscal Year	9,874		4,525
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,077		12,325
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	9,505		3,747
Loans and Leases Receivable, Gross	54,421		81,835
Commercial Real Estate [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		0
Commercial Real Estate [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		0
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	307,899		197,429
Financing Receivable, Originated Two Years before Latest Fiscal Year	118,013		154,234
Financing Receivable, Originated Three Years before Latest Fiscal Year	86,120		55,003
Financing Receivable, Originated Four Years before Latest Fiscal Year	22,212		31,804
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	23,683		27,118
Financing Receivable, Revolving	593,179		620,905
Financing Receivable, after Allowance for Credit Loss	575,392		915,434
Loans and Leases Receivable, Gross	1,726,498	2,103,152	2,004,645
Commercial And Industrial [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	11,553		1,818
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,292		1,426
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,772		4,787
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,141		1,609
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,531		544
Financing Receivable, Revolving	8,596		12,515
Financing Receivable, after Allowance for Credit Loss	4,726		1,896
Loans and Leases Receivable, Gross	33,611		24,645
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	296,008		193,832
Financing Receivable, Originated Two Years before Latest Fiscal Year	113,698		129,199
Financing Receivable, Originated Three Years before Latest Fiscal Year	83,243		44,664
Financing Receivable, Originated Four Years before Latest Fiscal Year	18,357		27,640
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	20,908		25,095
Financing Receivable, Revolving	577,872		565,953
Financing Receivable, after Allowance for Credit Loss	552,640		911,414
Loans and Leases Receivable, Gross	1,662,726		1,900,465
Commercial And Industrial [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	338		1,779
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,023		23,609
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,105		5,552
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,714		2,555
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	244		1,430
Financing Receivable, Revolving	6,711		42,437
Financing Receivable, after Allowance for Credit Loss	18,026		2,124
Loans and Leases Receivable, Gross	30,161		79,486
Commercial And Industrial [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		49
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		49
Commercial And Industrial [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		0
Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	253,189		242,277
Financing Receivable, Originated Two Years before Latest Fiscal Year	107,190		97,154
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,374		66,282
Financing Receivable, Originated Four Years before Latest Fiscal Year	22,951		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,568		6,810
Financing Receivable, Revolving	16,649		32,189
Financing Receivable, after Allowance for Credit Loss	63,620		91,981
Loans and Leases Receivable, Gross	496,539	553,929	537,788
Construction Loans [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17,560		367
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		382
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	417		177
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	17,977		926
Construction Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	235,629		241,910
Financing Receivable, Originated Two Years before Latest Fiscal Year	107,190		95,253
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,374		66,282
Financing Receivable, Originated Four Years before Latest Fiscal Year	22,951		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,568		6,810
Financing Receivable, Revolving	16,232		32,012
Financing Receivable, after Allowance for Credit Loss	63,620		91,981
Loans and Leases Receivable, Gross	478,562		535,343
Construction Loans [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		1,519
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		1,519
Construction Loans [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		0
Construction Loans [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		0
Small Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40,877		31,219
Financing Receivable, Originated Two Years before Latest Fiscal Year	24,300		22,799
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,351		16,988
Financing Receivable, Originated Four Years before Latest Fiscal Year	11,731		16,971
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	25,527		26,214
Financing Receivable, Revolving	34,931		41,200
Financing Receivable, after Allowance for Credit Loss	29,146		14,897
Loans and Leases Receivable, Gross	182,863	175,023	170,288
Small Business [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		11
Financing Receivable, Originated Two Years before Latest Fiscal Year	386		17
Financing Receivable, Originated Three Years before Latest Fiscal Year	202		12
Financing Receivable, Originated Four Years before Latest Fiscal Year	8		748
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	188		246
Financing Receivable, Revolving	655		563
Financing Receivable, after Allowance for Credit Loss	15		0
Loans and Leases Receivable, Gross	1,454		1,597
Small Business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40,220		30,764
Financing Receivable, Originated Two Years before Latest Fiscal Year	23,870		22,702
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,104		16,803
Financing Receivable, Originated Four Years before Latest Fiscal Year	11,712		16,109
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	25,050		25,521
Financing Receivable, Revolving	33,588		39,804
Financing Receivable, after Allowance for Credit Loss	29,131		14,711
Loans and Leases Receivable, Gross	179,675		166,414
Small Business [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	657		444
Financing Receivable, Originated Two Years before Latest Fiscal Year	44		80
Financing Receivable, Originated Three Years before Latest Fiscal Year	45		173
Financing Receivable, Originated Four Years before Latest Fiscal Year	11		114
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	289		447
Financing Receivable, Revolving	688		833
Financing Receivable, after Allowance for Credit Loss	0		186
Loans and Leases Receivable, Gross	1,734		2,277
Small Business [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		0
Small Business [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		0
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		0
Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	201,684		185,896
Financing Receivable, Originated Two Years before Latest Fiscal Year	103,045		213,767
Financing Receivable, Originated Three Years before Latest Fiscal Year	109,737		188,652
Financing Receivable, Originated Four Years before Latest Fiscal Year	111,755		264,118
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	499,582		500,624
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	214,476		78,072
Loans and Leases Receivable, Gross	1,240,279	$ 1,296,183	1,431,129
Residential Real Estate [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		427
Financing Receivable, Originated Three Years before Latest Fiscal Year	414		939
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		369
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,601		4,808
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	3,015		6,543
Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	201,684		185,896
Financing Receivable, Originated Two Years before Latest Fiscal Year	103,045		213,340
Financing Receivable, Originated Three Years before Latest Fiscal Year	109,323		187,713
Financing Receivable, Originated Four Years before Latest Fiscal Year	111,755		263,749
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	496,981		495,816
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	214,476		78,072
Loans and Leases Receivable, Gross	1,237,264		1,424,586
Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	72,942		70,369
Financing Receivable, Originated Two Years before Latest Fiscal Year	45,918		64,874
Financing Receivable, Originated Three Years before Latest Fiscal Year	41,749		64,584
Financing Receivable, Originated Four Years before Latest Fiscal Year	45,468		49,347
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	127,275		131,319
Financing Receivable, Revolving	634,716		693,576
Financing Receivable, after Allowance for Credit Loss	46,378		43,516
Loans and Leases Receivable, Gross	1,018,408		1,120,523
Home Equity Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		15
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	34		419
Financing Receivable, Revolving	1,651		2,466
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	1,685		3,203
Home Equity Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	72,942		70,369
Financing Receivable, Originated Two Years before Latest Fiscal Year	45,918		64,874
Financing Receivable, Originated Three Years before Latest Fiscal Year	41,749		64,569
Financing Receivable, Originated Four Years before Latest Fiscal Year	45,468		49,347
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	127,241		130,900
Financing Receivable, Revolving	633,065		691,110
Financing Receivable, after Allowance for Credit Loss	46,378		43,516
Loans and Leases Receivable, Gross	1,016,723		1,117,320
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	400		566
Financing Receivable, Originated Two Years before Latest Fiscal Year	304		266
Financing Receivable, Originated Three Years before Latest Fiscal Year	108		916
Financing Receivable, Originated Four Years before Latest Fiscal Year	571		836
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,179		9,228
Financing Receivable, Revolving	15,015		11,965
Financing Receivable, after Allowance for Credit Loss	281		451
Loans and Leases Receivable, Gross	22,858		24,228
Consumer Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0		35
Financing Receivable, Revolving	0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	0		35
Consumer Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	400		566
Financing Receivable, Originated Two Years before Latest Fiscal Year	304		266
Financing Receivable, Originated Three Years before Latest Fiscal Year	108		916
Financing Receivable, Originated Four Years before Latest Fiscal Year	571		836
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,179		9,193
Financing Receivable, Revolving	15,015		11,965
Financing Receivable, after Allowance for Credit Loss	281		451
Loans and Leases Receivable, Gross	22,858		24,193
Revolving converted to term [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	5,960		21,605
Revolving converted to term [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		14,854
Revolving converted to term [Member] | Commercial Real Estate [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		14,854
Revolving converted to term [Member] | Commercial Real Estate [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Commercial Real Estate [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Commercial Real Estate [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		2,718
Revolving converted to term [Member] | Commercial And Industrial [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		50
Revolving converted to term [Member] | Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		2,668
Revolving converted to term [Member] | Commercial And Industrial [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Commercial And Industrial [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Commercial And Industrial [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,998		1,095
Revolving converted to term [Member] | Construction Loans [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Construction Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,998		1,095
Revolving converted to term [Member] | Construction Loans [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Construction Loans [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Construction Loans [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Small Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Small Business [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Small Business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Small Business [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Small Business [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Small Business [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Residential Real Estate [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	3,962		2,938
Revolving converted to term [Member] | Home Equity Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		303
Revolving converted to term [Member] | Home Equity Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	3,962		2,635
Revolving converted to term [Member] | Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Consumer Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		0
Revolving converted to term [Member] | Consumer Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	$ 0		$ 0